Process for the manufacture of a fused block having a high zirconia content
AssigneeSaint-Gobain Centre De Recherches Et D'Etudes Europeen
InventorsIsabelle Cabodi, Pierrick Vespa, Laurent Battu, Olivier Citti
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Abstract
A process for the manufacture of a refractory block including more than 80% zirconia, in percentage by weight based on the oxides. The process includes the following successive stages: melting, under reducing conditions, of a charge including more than 50% zircon, in percentage by weight, such as to reduce the zircon and obtain a molten material, application of oxidizing conditions to the molten material, casting of the molten material, and cooling until at least partial solidification of the molten material in the form of a block. Also, the process can include heat treatment of the block.
Claims16
A process for the manufacture of a refractory block comprising more than 80% zirconia, in percentage by weight based on the oxides, said process comprising the following successive stages:
- a) melting, under reducing conditions, of a charge comprising more than 50% zircon, in percentage by weight, such as to reduce the zircon and obtain a molten material,
- b) application of oxidizing conditions to the molten material,
- c) casting of said molten material,
- d) cooling until at least partial solidification of the molten material in the form of a block,
- e) optionally, heat treatment of said block.
Dependencies are inferred from the claim text.